Thursday, April 20, 2017

Rules Based Engine using Tuples

Dynamic Rules Defined Using Tuple

  1. Input: Define Rules Case Conditions
  2. Output :Define Results based on Rules case conditions

       

          
   
    class Program
    {
        static void Main(string[] args)
        {
            var options = GenerateRulesBasedResults(true, false, false, false, true);
            foreach (var option in options)
            {
                Console.WriteLine (option.ToString());
                /* Ford
                 * BMW
                 * Mercedes
                 */
            }
            Console.Read();
        }
        public static List<CarSale> GenerateRulesBasedResults(bool isCruiseControl, bool isAutomatic, 
                                                               bool isUnderWarranty, bool isOnSale, bool isOnRoadOffSale)
        {
            List<CarSale> options;
            Results.TryGetValue(Tuple.Create(isCruiseControl, isAutomatic, isUnderWarranty, isOnSale, isOnRoadOffSale), out options);
            return options;
        }

        //I/P Rule Case Condition variant
        private static readonly Tuple<bool, bool, bool, bool, bool> RuleCaseCondition1 = Tuple.Create(true, false, false, false, true);
        private static readonly Tuple<bool, bool, bool, bool, bool> RuleCaseCondition2 = Tuple.Create(false, true, false, false, true);       

        //O/P Rule based results.
        private static readonly Dictionary<Tuple<bool, bool, bool, bool, bool>, List<CarSale>> Results =
            new Dictionary<Tuple<bool, bool, bool, bool, bool>, List<CarSale>>
        {
                { RuleCaseCondition1, new List<CarSale> {   CarSale.Ford , CarSale.BMW, CarSale.Mecedes} },

                { RuleCaseCondition2, new List<CarSale> {   CarSale.Suzuki , CarSale.Mazda} },
        };

        public enum CarSale
        {
            Honda,
            BMW,
            Mazda,
            Suzuki,
            Mecedes,
            Wolkswagen,
            Ford
        }

  

  
       
 

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